[Perfect Design]: Compass style, with a round knob handle, perfect for your palm [ for Apprentices and Professionals]: Glass round knife is designed for amateurs and professionals Clear scale, easy to read and use The glass cutter is equipped with a strong suction cup to firmly hold the center while the blade cuts the circle Perfect for cutting glass artwork, crafts and home use., Weight: 343.0 pounds, Manufacturer: IJSDNVJNDX